Adjustable latch

• US 7,607,701 B2
• Filed: 12/16/2005
• Issued: 10/27/2009
• Est. Priority Date: 12/16/2004
• Status: Expired due to Fees

• Current Assignee: Steven Levine
• Original Assignee: Steven Levine
• Inventors: Levine, Steven
• Primary Examiner(s): Lugo; Carlos
• Application Number:
  US11/303,733
• Publication Number:
  US 20060186672A1
• Time in Patent Office: 1,411 Days
• Field of Search: 292/1.5, 292/137, 292/163, 292/169, 292/337, 292/2, 292/DIG.60
• US Class Current: 292/163
• CPC Class Codes: E05B 63/06 with lengthwise-adjustable bolts ; with adjustable backset, i.e. distance from door edge
• CPC Class Codes: Y10S 292/60 Adjustment provisions
• CPC Class Codes: Y10T 292/06 Adjustable backset
• CPC Class Codes: Y10T 292/0969 Spring projected
• CPC Class Codes: Y10T 292/0977 Cam
• CPC Class Codes: Y10T 292/62 Bolt casings

Abstract

An adjustable door latch that enables one to adjust its length without removing any functionality from other areas of the door latch assembly. The improved door latch assembly includes a strike plate, adjustment head, adjustment stem, resilient member, and housing. The improved door latch utilizes a threaded adjustment head, which is screwed into an adjustment stem. The adjustment stem has a threaded aperture located on the front surface of a circular disc. The circular disc has at least one rib, which fits into the groove of a drum, this configuration prevents rotation of the circular disc when adjustment is necessary. The adjustment member and stem have apertures that allow one to thread the spindle of a door knob through the door latch assembly and to the other door knob.

Claims

1. A door locking assembly comprising:

a strike plate having an aperture;

a housing assembly, attached to said strike plate, having a housing portion and a rear end portion;

an adjustment stem positioned inside said housing assembly, said adjustment stem having a base portion, a plate portion, and an adjustable head portion threadably connected to said base portion;

an actuator for moving said adjustment stem between a locking position, wherein said adjustment stem is in a position distal to said rear end portion, and an unlock position, wherein said adjustment stem is in a position proximal to said rear end portion;

a spring member biasing said adjustment stem toward said locking position;

said base portion comprises a generally circular disk having a receiving opening and at least one fixed rib located on a circumferential surface of said disk that fits inside grooves located in an inner surface of said housing;

said adjustable head portion having a head that extends from said housing portion to lock said door locking assembly when said adjustment stem is in said locking position and to unlock said door locking assembly when said adjustment stem is in said unlock position, an aperture on a front surface, and a threaded protrusion that is threadably received into said receiving opening of said circular disc;

wherein, in order to adjust the position of the head with respect to said housing assembly,

1) the striker plate is detached from the housing assembly, allowing said head to rotate by means of a rotational means being inserted into said aperture in order to vary the distance that said threaded protrusion portion extends from said housing, or

2) with the striker plate attached to said housing assembly, said aperture receives rotational means, said head is pushed away from said strike plate aperture, moving said adjustment stem toward said second position against said spring biasing force, so that said head is allowed to be rotated by said rotational means in order to vary the distance that said threaded protrusion portion extends from said housing.

2. A door locking assembly according to claim 1, wherein said actuator comprises a handle disk mounted adjacent to the stem, said handle disk being rotatable to move said adjustable stem from a first position to a second position.

3. A door locking assembly according to claim 2, wherein said adjustable stem has one or more limiting members extending therefrom that interacts with said handle disk as said handle disk is turned.

4. A door locking assembly according to claim 1, wherein said groove may extend from a front surface to a distal end of a drum in said housing.

5. The door locking assembly according to claim 1, wherein said groove in said inner surface of said housing extends from a front surface of said drum.

6. The door locking assembly according to claim 1, wherein said base portion has a front surface and a rear surface and said front and rear surfaces are generally transverse to the direction of the plate portion.

7. The door locking assembly according to claim 1, wherein one of said head or said base portion of said adjustment stem has a male threaded member that is received by a female threaded member in the other of said head or said base portion of said adjustment stem.

8. The door locking assembly according to claim 1, where said plate portion has a double u shape with two u shaped cutouts back to back.

9. The door locking assembly according to claim 8 wherein said plate portion has an upper and lower prong extending from bottom surface of the plate portion.

10. The door locking assembly according to claim 9 wherein said upper prong having at least one limiting member extending outwardly, generally perpendicular on the left side surface.

11. The door locking assembly according to claim 10 wherein the limiting member is one of a pin or a peg.

12. The door locking assembly according to claim 9 wherein said plate portion has two limiting members extending outwardly, from said plate portion on an upper prong.

13. The door locking assembly according to claim 9 wherein said plate portion has two limiting members extending outwardly, from said plate portion on a lower prong.